The two-volume set CCIS 3111 + 3112 constitutes the proceedings of the 20th International Symposium on Organizational Sciences, SymOrg 2026, which took place in Kopaonik, Serbia, during June 2026.

The total of 54 full papers and 7 short papers included in the proceedings was carefully reviewed and selected from 154 submissions. The papers were organized in topical sections as follows: 

Part I: Invited Talk; Adaptive Marketing and Strategic Communications in Disruptive Environments; Applied Software Engineering; Blockchain Technology in Business and Information Systems; Challenges of Green and Digital Transformation; Creativity, Innovation, and Sustainable Management; Data and Business Analytics; Designing Organizations for Digitally Transformed Business Ecosystems; Digital Operations and Logistics Management; 

Part II: E-Business Ecosystems and Technologies; Human Resource Management for Building Resilient Empoloyees; Lean Management and Organization - Purpose, Process, People; Organizational Stragtegy and HYbrid Project Management; Quality Management and Standardization; Redesigning Finance for Permanent Disruption; Transformational Potential of Generative AI.